Publications by authors named "Michael E Grinton"

Purpose: MNV3 or Retinal angiomatous proliferation is a subtype of neovascular age-related macular degeneration (nAMD). We present the 5 year long term visual and anatomical outcomes of patients with MNV3 lesions treated with intravitreal Aflibercept.

Methods: This is a prospective study of treatment naïve patients with reading centre graded MNV3 lesions.

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Purpose: To provide an overview of the effect that the COVID-19 pandemic has had on visual electrophysiology referral patterns and the subsequent effect this may have on patients.

Methods: All electrodiagnostic tests performed at Kensington Vision and Research Centre, Toronto Canada, in a 3-month period prior to the COVID-19 pandemic (1 September 2019 to 30 November 2019) were compared to a 3-month period after the start of the COVID-19 pandemic (1 September 2021 to 30 November 2021).

Results: A total of 502 patients had electrodiagnostic testing carried out in the designated time periods: 292 in the time period prior to the COVID-19 pandemic and 210 patients after.

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Purpose: The coronavirus pandemic has prompted unprecedented delays to treatment with anti-VEGF intravitreal injections due to the need to reduce hospital attendances and prioritise the patients at highest risk of vision loss. This study aims to quantify the effect of these delays on visual acuity (VA) outcomes and optical coherence tomography (OCT) features for patients receiving treatment for neovascular age-related macular degeneration (nAMD), retinal vein occlusions (RVO) and diabetic macular oedema (DMO) and correlate to the Royal College of Ophthalmologists guidelines (RCOphth).

Methods: A retrospective data analysis of an electronic medical record was performed on a random sample of eyes receiving anti-VEGF injections for nAMD, RVO or DMO.

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We report a case of a 72-year-old female who developed bilateral pseudo-vitelliform dystrophy after taking desferrioxamine for the treatment of chronic iron overload. The patient then developed a right superior hemiretinal vein occlusion associated with intraretinal fluid in the right eye and was treated with monthly intravitreal aflibercept injections for 3 months followed by as required treatment. In addition to the intraretinal fluid responding to anti-VEGF treatment, there was a reduction in the size of the pseudo-vitelliform subfoveal deposit height, which was not seen in the untreated eye.

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: To describe a prospective case series of patients with acute macular neuroretinopathy (AMN) associated with acute influenza virus infection: Patients who presented with acute macular neuroretinopathy associated with confirmed influenza virus infection were subject to a detailed clinical history, HLA typing and longitudinal ophthalmological and imaging examinations.: Four female patients aged 18 to 32 years were studied. They reported the onset of ocular symptoms between 2 and 5 days after the development of flu like symptoms.

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Purpose: This report presents a case, which highlights key principles in the pathophysiology of macular holes. It has been hypothesized that anteroposterior (AP) and tangential vitreous traction on the fovea are the primary underlying factors causing macular holes [Nischal and Pearson; in Kanski and Bowling: Clinical Ophthalmology: A Systemic Approach, 2011, pp 629-631]. Spectral domain optical coherence tomography (OCT) has subsequently corroborated this theory in part but shown that AP vitreofoveal traction is the more common scenario [Steel and Lotery: Eye 2013;27:1-21].

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Background And Objective: To investigate the relationship between retinal vessel morphology (branching coefficient, bifurcation angle, and fractal analysis) and retinal nerve fiber layer (RNFL) thickness in an elderly population.

Patients And Methods: One hundred and one participants from the Lothian Birth Cohort 1936 (population of people all born in 1936) were studied. RNFL thickness measurements (using optical coherence tomography [OCT]) and digital retinal photographs were collected.

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